Lacan...Mantissa...Fowles...My head hurts

When considering the force of the death drive and jouissance as the orgasmic shattering of the self for which the death drive aims, you read Mantissa as a sexual book rather than about a signified, signifier type of reading. You don't see it as him being out of his head, you see it as the doctors taking extreme measure to get him to regain his memory. Maybe if that is how you view it, you can see it as them trying to get him totally to "shatter" his own self (that self which has a lack of memory) into becoming his old self (one which possesses his memories). According to Fowles, Our sexual identities are part of how we interpret our own identities and how we see ourselves as well as how others see us.
For Lacan, sexuality is antithetical to our identities and endangers how we see the self and how we behave. Hence, he takes literal meaning to the term orgasm meaning "little death"... the self is completely shattered and the sexual being takes over. Where identity prevails, the sexual takes over and becomes more prevalent, as shown in Fowles' novel Mantissa. Miles has no idea who he is yet he knew about his sexual identity (as when he recalls to the muse, "I don't know who I am but I know I wouldn't do such things [sexually]".) Therefore, these two authors have somewhat opposing ideas yet the main idea of a lack of identity leads to sexual prevailence is present. Lacan believes these two terms, identity and sexuality, to be contradictory which is also shown in Mantissa by Miles not recalling who he was until his sexuality came forth. Wait. If these two are opposing, it would be hard for them to go hand in hand as they did in Mantissa. How is one not directly related to the other if Miles could not regain consciousness until his sexual side was explored?
Mantissa confused me. But I'm still trying to get the hang of it. Ashley's post on Lacan did help me understand it a little more, but I still can't figure out if Fowles and Lacan are opposing views alltogether or if their sexuality theories go hand in hand somehow. Looks like I've got some q's for Dr. M. tomorrow.